The grab is a mounted crane handling equipment designed for gripping, reloading and transporting bulk cargo, scrap metal, timber over short distances.
The grab for bulk cargo ( the bucket grab) works on the principle of burying and grabbing the load. For better gripping of the load, the grapple tines can be equipped with teeth.
The grab for loading and unloading long loads (pulpwood bolts, logs, pipes, etc.) is similar in structure to the bucket grab, but its tines have the shape of two claw-like grips.
The use of grabs allows fully mechanizing loading operations.
According to loading material :
According to the trajectory of tine movement when scooping up the load:
The tines of burrowing grabs when working go deeper into the material ("digging").
The tines of raking grabs during operation move in a straight line close to the horizontal plane, as a result of which the load, scattered in a thin layer, is raked up and scooped up.
According to the type of tine closing drive and kinematic features, grabs are divided into the following types:
Common to rope grabs is the absence of a rigid kinematic connection between the upper and lower beams of the grab and their suspension unit on the crane. These grabs are driven by hoisting ropes.
Depending on the number of ropes, rope grabs are divided into the following groups:
1) motor and electro-hydraulic.
The grab is connected with a crane via the power cable that supplies electricity to the electric motor of the tine drive (a geared motor or a hydraulic unit).
2) pneumatic and hydraulic.
Only executive devices are installed directly on the grab: hydraulic or pneumatic cylinders. This type of grab is connected to the crane by hydraulic or pneumatic lines.
OOO "KEP" DimAl "manufactures grabs for types of cargo in accordance with GOST 24599-87.
It is forbidden to install the grab on a crane with a larger capacity than indicated in the technical characteristics of the grab (or it is required to adjust the device of the load limiter to the characteristics of the crane specified in the technical characteristics of the grab).
0,6 т/м3 (стружка)
Меньше 5 тонн
круглый
от 100 до 250 кг
0,5
300
0,2
0,1
С3
2,0
1300
1200
975
730
685
2,8
1,0
410
0,35
0,35
Л2
1,0
2000
1900
1480
1100
1030
3,7
1,5
500
0,5
0,35
С2
1,4
2000 (1900)
1900
1480
1100
1030
3,7
2,0
880
1,0
0,5
С3
2,0
2230
1940
1700
1375
936
4,5
3,2
1000
1,6
0,8
С3
2,0
2250
1950
1700
1375
1300
4,4
5,0
1500
2,0
1,0
С3
2,0
2800
2400
2210
1705
1480
6,1
5,0
1800
2,5
1,0
Т1
2,5
2800
2400
2210
1705
1480
6,1
5,0
1800
2,7
1,5
С3
1,8
3150
2700
2525
1960
1700
7,3
10,0
3200
5,0
2,5
С3
2,0
3580
3000
3130
2315
1740
8,7
12,0
6000
6,0
3,0
С1л
2,0
3600
3200
3450
2710
1750
8,0
15,0
7000
7,0
7,0
С1л
1,0
5200
4000
4600
3610
2150
10,0
1,0
750
0,14
0,07
С3
2,0
1650
1530
930
850
1,5
1,0
800
0,2
0,1
С3
2,0
1750
1050
1095
1050
2,0
2,0
1200
1,2
0,25
С3
2,0
2140
1820
1350
1410
2,5
10,0
400
4,0
2,0
С3
2,0
3560
3030
2480
2600
5,5